It is often said that the pyramid of energy is always upright. On the other hand, the pyramid of biomass can be both upright and inverted." Explain with the help of example and sketches .

Explanation

### Step-by-Step Solution

1. **Understanding Ecological Pyramids**:
- Ecological pyramids represent the distribution of energy, biomass, or numbers of organisms at each trophic level in an ecosystem. The two types we will focus on are the pyramid of energy and the pyramid of biomass.

2. **Pyramid of Energy**:
- The pyramid of energy illustrates the flow of energy through different trophic levels in an ecosystem. It is always upright because energy transfer is unidirectional and decreases at each trophic level.
- According to the 10% law of energy transfer, only about 10% of the energy from one trophic level is transferred to the next. This means that producers (like plants) have the highest energy, followed by primary consumers (herbivores), secondary consumers (carnivores), and tertiary consumers (top predators).
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